#Background{
    position: fixed;
    width:100%;
    height:100%;
    top:0;
    left:0;
    z-index: -1;
    opacity: 0.8;
}
#Background-image{
    width:100%;
    height:100%;
/*    z-index: -999;*/
    z-index: -1;
}
@media screen and (max-width: 650px) {
    #Background{
        position: fixed;
        top:0;
        left: auto;
        opacity: 0.6;
        margin: 0;
        padding: 0;
    }
    #Mobile-Background{
        width:100%;
        height: 100%;
        margin: 0;
        padding: 0;
        opacity: 1.0;
    }
}